As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
UNABLE TO PRESSURIZE AIRCRAFT IN MANUAL OR AUTO MODE, NO CAUTION MESSAGES, DIVERTED TO XNA. REMOVED INSULATION FROM SAFETY VALVE AND REMOVED AND REPLACED NUMBER TWO CABIN PRESSURE CONTROLLER IAW EMB AMM. OPERATIONAL CHECK GOOD, RETURNED AIRCRAFT TO SERVICE.